21235132 has 12 divisors (see below), whose sum is σ = 37202760. Its totient is φ = 10605776.

The previous prime is 21235127. The next prime is 21235147. The reversal of 21235132 is 23153212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2043 + ... + 6829.

It is an arithmetic number, because the mean of its divisors is an integer number (3100230).

Almost surely, 2^21235132 is an apocalyptic number.

It is an amenable number.

21235132 is a deficient number, since it is larger than the sum of its proper divisors (15967628).

21235132 is a wasteful number, since it uses less digits than its factorization.

21235132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5900 (or 5898 counting only the distinct ones).

The product of its digits is 360, while the sum is 19.

The square root of 21235132 is about 4608.1592854414. The cubic root of 21235132 is about 276.9182988334.

Adding to 21235132 its reverse (23153212), we get a palindrome (44388344).

It can be divided in two parts, 212 and 35132, that added together give a square (35344 = 188²).

The spelling of 21235132 in words is "twenty-one million, two hundred thirty-five thousand, one hundred thirty-two".